I used to frequent the Retrobike forums for a long time and some of the standard colour schemes/designs in the 90’s were just unbelievable. Even in quite low range bikes they put stupid amount of effort into the paintwork. Unfortunately as can be seen on this thread all you get nowadays is a single colour with some computer drawn graphics on, so sorry I can’t get exited about a yellow bike with the manufacturers name in black type on the Dow tube!
One of the regulars on RB was someone who used to be resonably senior at GT bikes. Remember those amazing multi colour splatter/stipe paint jobs in early 90s? Apparently they had to go through the paint booths 3 or 4 times, even the entry level £200 bikes, as the paintwork was pretty complex to do (and their paint is indestructible too!).
The Zolatone paint on those Marins is impossible to replicate as Marin got a company called Zolatone to make it for them (they are still a specialist paint company) – RB members have tried to replicate it and got close but not perfect as they don’t make that paint any more.
And that’s just the bog standard bikes!
Klein paintwork is stupid hard to do, they have several coats of colour on top of each other to get that amazing result – people do repaint them successfully but you have to know the colour combos they used for the final colour or it won’t pop like the original. Needless to say getting one of the (very limited) people who are skilled enough to do it for you is very costly.